PDF transformation and inspection utility
QPDF is a command-line program that does structural, content-preserving transformations on PDF files. It could have been called something like pdf-to-pdf. It also provides many useful capabilities to developers of PDF-producing software or for people who just want to look at the innards of a PDF file to learn more about how they work.
Homepage: https://qpdf.sourceforge.net/
Maintainer: Antoine Jacoutot <ajacoutot@openbsd.org>